[3.x] Add support for repackaging the generated UWP APPX file with makeappx

[panreyes]

This solves #79278

This commit makes Godot 3.5 use makeappx.exe to repack the APPX file generated when exporting for UWP platform.

Currently the integrated exporter has some unknown packaging error. I have tried to figure it out without success and, after that, I considered that the fastest and most practical solution is to just use Microsoft's official tool to repackage it.

How to make it work:

• In Editor Settings/UWP, we include the path to makeappx.exe.
• When exporting to the UWP platform, Godot 3.5 will use makeappx.exe to repack the APPX file correctly.

Requiring the use of makeappx.exe is not a big problem, since to sign the packages we also need the signtool.exe tool. Both tools are part of the Windows 10/11 SDK.

With this change, and this one godotengine/godot-build-scripts#80 (comment) , Godot 3.5 will correctly be able to export to UWP format for XBOX. I have tested it and it works flawlessly for most 2D games at least.

Production edit: Closes #30558

[panreyes]

I just learnt about clang formatting and git reset 😅 Hopefully, checks will pass this time :)

[panreyes]

I also wrote a PowerShell script that solves this issue outside of Godot.
https://github.com/panreyes/godot-appx-repackager

It's not an embedded solution, but it's probably compatible with all UWP Godot 3.x releases.

[akien-mga]

I don't really have time to review in depth, but since it's working fine for @panreyes to ship games, I think we can merge.

[akien-mga]

Thanks!

[akien-mga]

Cherry-picked for 3.5.3.

[dannygaray60]

I tried @panreyes script with the godot generated appx and I got this error:

The path (/p) parameter is: "\?\D:\Godot Exports\toziuha_oota\uwp_free\toziuha_oota.appx"
The content directory (/d) parameter is: "\?\C:\Users\Danny\AppData\Local\Temp\appx-repack\game"
Enumerating files from directory "\?\C:\Users\Danny\AppData\Local\Temp\appx-repack\game"
Packing 2539 file(s) in "\?\C:\Users\Danny\AppData\Local\Temp\appx-repack\game" (content directory) to "\?\D:\Godot Exports\toziuha_oota\uwp_free\toziuha_oota.appx" (output file name).
Memory limit defaulting to 4235565056 bytes.
MakeAppx : error: You must include a valid app package manifest file named AppxManifest.xml in the source.
MakeAppx : error: Package creation failed.
MakeAppx : error: 0x80080203 - The specified package format is not valid: The file is not a valid app package because it is missing a required footprint file.
Error: Could not repackage the APPX file.

godot version: v3.5.3.stable.official [6c81413]